Make parser template class

This commit is contained in:
IlyaShurupov 2023-11-06 15:43:31 +03:00 committed by Ilya Shurupov
parent 419ebb43d1
commit b3e5bf0941
9 changed files with 50 additions and 94 deletions

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@ -3,16 +3,17 @@
#include "AST.hpp"
#include "GrammarCompiler.hpp"
#include "Sentence.hpp"
namespace tp {
template <typename tAlphabetType>
class Parser {
public:
Parser() = default;
public:
void compileTables(const ContextFreeGrammar& cfGrammar, const RegularGrammar& reGrammar);
void parse(const Sentence& sentence, AST& out);
void compileTables(const ContextFreeGrammar& cfGrammar, const RegularGrammar<tAlphabetType, ualni>& reGrammar) {}
void parse(const tAlphabetType* sentence, ualni sentenceLength, AST& out) {}
public:
// save load compiled tables

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@ -1,13 +0,0 @@
#pragma once
#include "LanguageCommon.hpp"
namespace tp {
struct Sentence {
const int1* buffer = nullptr;
alni symbolSize = 1;
explicit Sentence(const char* buff) { buffer = buff; }
};
}

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@ -5,16 +5,53 @@
namespace tp {
// Gives ability to express grammar in the Unified Format as sentence
template <typename tAlphabetType>
class SimpleParser {
public:
SimpleParser();
SimpleParser() {
// Grammar for unified grammar format sentence that tables compiled from
// Define Context-Free grammar
ContextFreeGrammar contextFreeGrammar;
{
// use existing CF grammar interface
contextFreeGrammar.addRule("a", { ContextFreeGrammar::Arg("") });
contextFreeGrammar.setStart("a");
}
// Define Regular grammar
RegularGrammar<tAlphabetType, ualni> rg;
{
// this is basically ast from existing tokenizer
rg.addRule(rg.seq({ rg.val('a'), rg.val('b') }), 0);
}
mUnifiedGrammarParser.compileTables(contextFreeGrammar, rg);
}
public:
void compileTables(const Sentence& grammar);
void parse(const Sentence& sentence, AST& out);
void compileTables(const tAlphabetType* grammar, ualni grammarLength) {
AST unifiedGrammarAst;
mUnifiedGrammarParser.parse(grammar, grammarLength, unifiedGrammarAst);
// compile each ast into RegularGrammar and ContextFree Grammar api instructions
ContextFreeGrammar userContextFreeGrammar;
RegularGrammar<tAlphabetType, ualni> userRegularGrammar;
// ...
// split ast into RE and CF part
// generate and execute grammar api commands
// use existing tokenizer code to create RE transition matrix
// ...
// compile tables from user grammar
mUserParser.compileTables(userContextFreeGrammar, userRegularGrammar);
}
void parse(const tAlphabetType* grammar, ualni grammarLength, AST& out) { mUserParser.parse(grammar, grammarLength, out); }
private:
Parser mUnifiedGrammarParser;
Parser mUserParser;
Parser<tAlphabetType> mUnifiedGrammarParser;
Parser<tAlphabetType> mUserParser;
};
}